Little Killer Sudoku Puzzle (Daily Sudoku League #144)

The first Little Killer Sudoku which I prepared was in year 2007. That time it was very difficult for me to create the image of this Sudoku type, so I have not created this Sudoku type for many years. Now recently, I have create few Little Killer Sudoku and automated process to creating image. The feedback for these Sudoku puzzle which I got after these being tested that I should have avoided give numbers in the grid. Without the given number number this Sudoku would had been very tough. In fact with the 4 given hints, I will still mark this Sudoku as tough Sudoku. Lets see how much time you take to solve this Sudoku?